Okay, dumb question time. What is pot metal composition wise?
Where is it used on a car?
James John Harvey wrote: Dissimilar metals for the most part have a reaction. Some are just more notable than others. I didn't think Stainless steel had much reaction with aluminum, although regular carbon steels sure do. Usually stainless is pretty benign and unreactive. Pot metal doesn't seem to react much with regular steel, as evidenced by the fact that you can get your fasteners out of there, usually, and you rarely find problems on the body panels where it is mounted. Pot metal does suffer from weather and salt. I think you are pretty safe using stainless fastners with aluminum, but you must be certain that the gasket between the aluminum and the steel parts like fenders and headlight pots is properly positioned and in good shape.John |